R&D Report 1971-20 : Optimum parameters for a RF power-splitting network R.E. Davies Abstract Splitting networks well matched over a band of frequencies are required for aerial feeder systems. General design formulae are developed and applied to a particular example for purposes of illustration.

Topics: frequency, admittance, impedance, characteristic, network, error, input, impedances, equation, bbc,...

Bell System Technical Journal, 18: 2. April 1939 pp 300-314. The Number of Impedances of an n Terminal Network. (Riordan, John)

Topics: impedances, terminals, exp, voltmeter, network, measurable, ammeter, transfer, enumeration,...

Audio instrument amplifier from Spectra-Strip Wire & Cable Corp.

Topics: instrumentation, rms, impedances, reo, audio, input, assemblies, amplifier, ohm, model

Bell System Technical Journal, 10: 2. April 1931 pp 284-341. Extentions to the Theory and Design of Electric Wave-Filters. (Zobel, Otto J.)

Topics: impedance, impedances, image, transmitting, frequency, networks, shunt, terminal, frequencies,...

Bell System Technical Journal, 46: 1. January 1967 pp 81-104. A High-Quality Waveguide Directional Filter. (Abele, T.A.)

Topics: filter, waveguide, directional, bandstop, bandpass, synthesis, circuit, impedances, microwave,...

Journal of Research of the National Institute of Standards and Technology

Topics: intrinsic impedance standard, ac quantum Hall effect, equivalent electrical circuits, parasitic...

T.E. Shea Transmission Networks and Wave Filters D. Van Nostrand Company Inc. 1929 Acrobat 7 Pdf 19.0 Mb. Scanned by artmisa using Canon DR2580C + flatbed option

Topics: Electronics, Transient, Fourier Series, Low Pass, High Pass, Band Pass, Filter Sections, Impedances

R&D Report 1971-17 : Active aerial arrays: Reciprocity J.L. Eaton Abstract It is shown that the usual Reciprocity Theorem does not hold in general for active aerial arrays. A new formulation of reciprocity is presented which can be applied to active aerials.

Topics: reciprocity, amplifier, amplifiers, aerial, output, transmitting, array, active, linear,...

Bell System Technical Journal, 14: 4. October 1935 pp 558-572. Dr. Campbell's Memoranda of 1907 and 1912.

Topics: crosstalk, circuit, impedance, unbalance, impedances, phantom, circuits, mutual, admittances,...

Bell System Technical Journal, 9: 4. October 1930 pp 770-793. Impedance Correction of Wave Filters. (Payne, E.B.)

Topics: impedance, filter, filters, crosstalk, frequency, impedances, coefficient, reflection, image,...

Bell System Technical Journal, 57: 1. January 1978 pp 35-59. Physical and Transmission Characteristics of Customer Loop Plant. (Manhire, L.M.)

Topics: loop, loops, survey, impedances, khz, loaded, nonloaded, kilofeet, bell, sampled, main station,...

Bell System Technical Journal, 53: 9. November 1974 pp 1845-1892. The Use of Negative-Impedance Units Inserted Uniformly Into a Transmission Line Reduce Attuation. (Manley, J.M.)

Topics: nib, negative, impedance, transmission, units, booster, frequency, resistance, impedances,...

A direct current ballast circuit for a two electrode metal halide lamp is described. Said direct current ballast circuit includes a low voltage DC input and a high frequency power amplifier and power transformer for developing a high voltage output. The output voltage is rectified by diodes and filtered by inductor and capacitor to provide a regulated DC output through commutating diodes to one terminal of the lamp at the output terminal. A feedback path from the output of the filter capacitor...

Topics: NASA Technical Reports Server (NTRS), BALLASTS (IMPEDANCES), DIRECT CURRENT, LUMINAIRES, METAL...

Bell System Technical Journal, 2: 4. October 1923 pp 1-30. Mutual Impedances of Grounded Circuits. (Campbell, George A)

Topics: mutual, grounded, circuits, earth, surface, integral, neumann, flow, filaments, impedances, mutual...

Bell System Technical Journal, 9: 4. October 1930 pp 628-651. Mutual Impedances of Ground-Return Circuits. (Bowen, A.E.; Gilkeson, G.L.)

Topics: mutual, earth, impedances, experimental, impedance, calculated, circuits, conductivity, cycles,...

Bell System Technical Journal, 10: 3. July 1931 pp 485-513. Negative Impedances and the Twin 21-Type Repeater. (Crisson, George)

Topics: circuit, impedance, negative, resistance, impedances, terminals, amplifier, series, repeater,...

Bell System Technical Journal, 42: 6. November 1963 pp 2551-2574. A Three-Conductor Elementary Clogston Coaxial Transmission Line --- Calculation, Fabrication and Experiment. (Manley, J.M.)

Topics: clogston, attenuation, conductors, dielectric, mode, coaxial, transmission, conductor, impedances,...

Bell System Technical Journal, 14: 3. July 1935 pp 509-533. Mutual Impedances of Parallel Wires. (Hoyt, Ray S.; Mead, Sallie Pero)

Topics: mutual, wires, impedances, wire, formulas, filament, filamentary, impedance, currents, parallel,...

R&D Report 1973-22 : Directional coupler design. G.W. McNally The design and performance of directional couplers are investigated with examples of 0 dB, 6 dB and 15 dB couplers being detailed to illustrate the configurations and construction methods used.

Topics: coupler, bbc, coupling, impedances, characteristic, strips, stripline, impedance, coupled,...

Bell System Technical Journal, 9: 2. April 1930 pp 325-331. The Reciprocal Energy Theorem. (Carson, John R.)

Topics: transmission, theorem, reciprocal, antenna, transducer, impedance, transmitting, impedances,...

Bell System Technical Journal, 16: 3. July 1937 pp 303-318. A Ladder Network Theorem. (Riordan, John)

Topics: impedances, network, impedance, theorem, transducer, networks, ladder, terminals, current,...

Bell System Technical Journal, 2: 1. January 1923 pp 1-46. Theory and Design of Uniform and Composite Electric Wave-filters. (Zobel, Otto J.)

Topics: impedance, impedances, transmitting, frequency, equivalent, frequencies, shunt, series, constant,...

Bell System Technical Journal, 12: 4. October 1933 pp 452-468. Classification of Bridge Methods of Measuring Impedances. (Ferguson, John G.)

Topics: bridge, impedances, ratio, adjustable, impedance, components, equation, type, inductance, bridges,...

Bell System Technical Journal, 3: 4. October 1924 pp 567-620. Transmission Characteristics of Electric Wave-Filters. (Zobel, Otto J.)

Topics: transmission, terminals, impedances, impedance, parameters, transmitting, formulae, transducer,...

New 50 Kw xenon short arc lamp mounted within elliptical collector provides irradiance levels up to 4.4 x 10 to the 7th power watts/sq m with non-uniformity ratio of 3.30. Energy mixer or light pipe between lamp source and target improves non-uniformity to required ratio.

Topics: NASA Technical Reports Server (NTRS), ARC LAMPS, BALLASTS (IMPEDANCES), IRRADIANCE, LIGHT SOURCES,...

R&D Report 1959-18 : Ring-type transmission-line networks. G.J. Phillips At V.H.F and higher frequencies increasing use is being made of filter networks employing closed rings of transmission line or waveguide. The theory developed here enables them to be related in a simple way to lumped-impedance networks. This not only provides a method of analysing well known arrangements, but is a useful tool in designing new arrangements based on a given lumped-impedance network. The utility of a...

Topics: impedance, impedances, equivalent, terminals, network, networks, lines, circuit, frequency,...

Titanium dioxide (TiO2) is the most efficient photocatalyst for organic oxidative degradation. TiO2 is effective not only in aqueous solution, but also in nonaqueous solvents and in the gas phase. It is photostable, biologically and chemically inert, and non-toxic. Low-energy UV light (approximately 375 nm, UV-A) can be used to photoactivate TiO2. TiO2 photocatalysis has been used to mineralize most types of organic compounds. Also, TiO2 photocatalysis has been effectively used in...

Topics: NASA Technical Reports Server (NTRS), TITANIUM OXIDES, COMMERCIAL OFF-THE-SHELF PRODUCTS,...

Bell System Technical Journal, 14: 2. April 1935 pp 211-214. A General Theory of Electric Wave Filters. (Bode, H.W.)

Topics: filter, filters, impedance, roots, ladder, theory, structures, image, impedances, general, filter...

R&D Report 1965-47 : The C.B.S 'Volumax' limiter D.W. Stebbings The 'Volumax' limiter is an automatic gain regulating device for controlling the programme input to a transmitter; it is claimed that it will maintain a high average programme level while preventing overmodulation. The limiter has a slower attack time and a faster recovery time than the corresponding Corporation equipment, and relies on a built-in peak clipper to prevent momentary overmodulation. The performance of the...

Topics: limiter, clipper, gain, characteristic, clipping, output, distortion, signal, peak, reduction,...

Bell System Technical Journal, 30: 3. July 1951 pp 530-563. Some Circuit Properties and Applications of n-p-n Transistors. (Wallace, R.L., Jr.; Pietenpol, W.J.)

Topics: collector, emitter, transistor, ohms, transistors, voltage, grounded, impedance, input, current,...

R&D Report 1973-16 : Medium frequency directional aerials L.K. Bradley The principal design considerations for highly directional MF aerial arrays are presented together with a detailed calculation relating to a particular example of an in-line four-element directional array. Techniques for providing phase control and power splitting are also considered.

Topics: directional, phase, aerial, radiators, mast, arrays, impedances, bbc, required, aerials, aerial...

Network Equivalent Analysis Users Guide, introduction section - C-E-I-R 1965

Topics: equivalent, transient, data, program, network, impedance, circuit, impedances, short, stability,...

Bell System Technical Journal, 34: 2. March 1955 pp 333-360. Stability of Negative Impedance Elements in Short Transmission Lines. (Gammie, J.; Merrill, J.L., Jr. )

Topics: impedance, stability, circuit, impedances, negative, bisected, network, tanh, repeater, frequency,...

R&D Report 1970-31 : VHF receiving aerials: The use of active elements D.J. Whythe An array of half-wavelength dipoles forms the most convenient type of aerial for VHF television re-broadcast reception. The principles are well-known by which such an array can be designed to have any specified directivity but re-radiation from the dipole makes it difficult to implement those principles in practice. This report shows that the difficulty can be overcome by incorporating an amplifier directly...

Topics: dipole, array, dipoles, directivity, input, active, impedance, amplifier, rth, terminals, mutual...

Bell System Technical Journal, 1: 2. November 1922 pp 1-32. Physical Theory of the Electric Wave-Filter. (Campbell, George A.)

Topics: artificial, impedance, impedances, formulas, lattice, bands, frequencies, iterative, attenuation,...

Bell System Technical Journal, 60: 1. January 1981 pp 89-116. High-Frequency Behavior of Waveguides with Finite Surface Impedances. (Dragone, C.)

Topics: boundary, waveguide, waveguides, dielectric, values, propagation, behavior, modes, corrugated,...

Bell System Technical Journal, 8: 3. July 1929 pp 560-575. Shielding in High-Frequency Measurements. (Ferguson, J.G.)

Topics: shielding, admittance, shield, circuit, impedance, bridge, admittances, shielded, electrostatic,...

Bell System Technical Journal, 37: 4. July 1958 pp 835-876. Transmission Characteristics of a Three-Conductor Coaxial Transmission Line with Transpositions. (Raisbeck, G.; Manley, J.M.)

Topics: conductor, coaxial, center, transposed, intermediate, conductors, cable, transposition,...

Bell System Technical Journal, 41: 2. March 1962 pp 745-768. Lined Waveguide. (Unger, H.G.)

Topics: waveguide, lining, lined, modes, curvature, impedance, circular, coupling, tan, wave, electric...

Bell System Technical Journal, 17: 1. January 1938 pp 17-48. The Impedance Concept and its Application to Problems of Reflection, Refraction, Shielding and Power Absorption. (Schelkunoff, S.A.)

Topics: impedance, wave, waves, impedances, reflection, ratio, radial, transmission, field, characteristic,...

Bell System Technical Journal, 39: 4 July 1960 pp 947-962. Synthesis of Driving-Point Impedances with Active RC Networks (Sandberg, I.W.)

Topics: impedance, synthesis, impedances, converter, active, network, poles, biquadratic, realization,...

Line Amplifiers from Quindar Electronics Inc.

Topics: dbm, output, input, amplifier, ohms, impedance, level, simplex, cps, impedances, output level,...

Bell System Technical Journal, 4: 1. January 1925 pp 52-111. Mutual Inductance in Wave Filters with an Introduction on Filter Design. (Johnson, K.S.; Shea, T.E.)

Topics: impedance, inductance, mutual, equivalent, meshes, filter, image, attenuation, characteristics,...

Bell System Technical Journal, 19: 2. April 1940 pp 290-305. A Solution for Faults at Two Locations in Three-Phase Power Systems. (Vaage, E.F.)

Topics: equations, currents, fault, faults, voltages, impedances, phases, sequence, ground, phase, positive...

Bell System Technical Journal, 14: 4. October 1935 pp 666-679. Further Extensions of the Theory of Multi-Electrode Vacuum Tube Circuits. (Levin, S.A.; Peterson, Liss C.)

Topics: tube, circuits, grid, circuit, conductive, theory, impedances, vacuum, equations, deg, technical...

Bell System Technical Journal, 6: 2. April 1927 pp 258-294. A Study of the Regular Combination of Acoustic Elements, with Applications to Recurrent Acoustic Filters, Tapered Acoustic Fibers, And Horns. (Mason, W.P.)

Topics: cosh, sinh, impedance, equation, velocity, propagation, filter, acoustic, impedances, tapered,...

One of the student manuals issued for the 2nd-year foundational course in Electrical Engineering (EEE221W, Module E - Electronic Circuits) offered by the University of Cape Town.

Topics: Semiconductors, Electrons, Conduction, Doped Semiconductors, Diodes, PN Junction, Zener Diodes,...

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One of the student manuals issued for the 2nd-year foundational course in Electrical Engineering (EEE221W, Module A - Electrical and Electronic Circuits) offered by the University of Cape Town. The module gives a thorough account of electrical circuit analysis techniques, and it also provides an introductory course in basic electronics.

Topics: AC Steady-State Analysis, AC Steady-State Power, ACtive Elements, Ammeters, Apparent Power, Average...